ATC Supervisor - Trend Service
Trend Service used to plot Tag values in real time X-Y Plots. The X axis are always the Tag values time stamp. Each trend can have up to 6 assigned tags. At the moment only one Y axis exist, so the assigned Tags should have the the same units.
Trend Service writes the trends data sets to hard disk in compressed daily files. The Historical Trend Viewer can be used to view the file contents and display the selected day trend.